On Apr 19, 2009, at 7:46 AM, Stefan Behnel wrote:
> Mark Lodato wrote:
>> you could embed the interpreter and statically link your module.
>> [...]
>> ----------------------------------- main.c
>> ---------------------------
>> #include <Python.h>
>>
>> // For each Cython module you want to embed, you must declare an
>> // init<module> function, like so:
>> PyMODINIT_FUNC initmylib(void);
>>
>> int
>> main(int argc, char *argv[])
>> {
>> // The first step is to set up the Python interpreter:
>> Py_Initialize();
>> PySys_SetArgv(argc, argv);
>>
>> // Next, we need to tell Python that our module exists. Call
>> each
>> // of the functions you declared above.
>> initmylib();
>>
>> // Now do some Python stuff. The easiest thing to do is to give
>> // the interpreter a string of Python code that imports your
>> // module and calls it.
>> PyRun_SimpleString("from mylib import main\n"
>> "main()\n");
>>
>> // When we're done, tell Python to clean up.
>> Py_Finalize();
>> return 0;
>> }
>> ---------------------------------------------------------------------
>> -
>
> I wonder if it makes sense to add support for this to Cython. You
> could
> have a command line option that adds a suitable main() function
> that runs
> the module code in an embedded CPython interpreter (and that does
> the setup
> correctly for Py2 and Py3).
+1, I think that's an excellent idea. http://trac.cython.org/
cython_trac/ticket/289
> Or maybe an additional tool like Python's "freeze" (what about
> naming it
> "cool" or "maincyfy"? Or maybe "(em)bedcy"?) could take a list of
> Cython
> modules and generate a main .c file like the one above, which would
> simply
> run the module initialisation in order. That would make it trivial
> to write
> a 'main module' (passed as last argument) that simply contains the
> main
> program code in its body.
>
> We might even be able to check module interdependencies here, so
> that the
> tool can bail out if it knows that the sequential module
> initialisations
> cannot work in an embedded setup.
>
> Tons of cool stuff to do here ...
Yep, that'd be cool. With enough work, we could totally do a
"freeze." (Actually, if we use freeze it might not be that much work
at all, but I haven't looked into it yet.)
- Robert
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